Collapsible core



G. E. ECKLEH.

COLLAPSIBLE CORE.

APPLICATION FILED OCT. 18, 1919.

1,361,840. iatented Dc. 14,1920- 2 SHIEETSSHEET 1.

Gearge E. Eek/e) INVENTOR. f?

A TTORNEY lar parts in the different figures:

UNITED STATES PATENT OFFICE.

GEORGE 1i. ECKLEB, OF-Anon, OHIO.

' I. eoLLArsIBLE coma Specification of iLetters Patent. P t t d 14, 1 2

Applicationcfiled October. 18, 1919. Serial No. 331,552.

in cores for manufacturing the outer shoes or casings for pneumatic tires, and has particular relation to that type of such cores which are made up of separable sections adapted to abut in the form of an annulus.

The primary objectof the invention is to provide a new and improved means for bolding and locking the several sections of which the core is composedin assembled annular relation. Another object is to'provide a collapsible core of the character described of simple construction which ma be quickly assembled or collapsed and W lich when assembled will provide a firm annular mandrel for imparting to the interior of the tireshoethe desired shape. e A still further object is to provide'a collapsible core having a fastening means which will hold the several parts ofwhich it is composed in perfectalinement after long and continued use.

With the foregoing and other objects in view, the invention consists in thenovelconstruction, combination and arrangement; of parts hereinafter specifically described and illustrated in the accompanying-drawings which form a part hereof wherein'ois shown the preferred embodiment oft-he invention, but it is to be understood that changes,'variations and modifications can be-resortedto which come within the scope of the matter hereinafter claimed. fi In the drawings in which likenumerals of reference are employed to indicate simi Figure l is a side elevation of bodying this invention, 1 1 1 Fig; 2 is a side'elevation fofthe locking ring employed in assembling thecore.

Fig. 3 is a transverse cross-sectional view of the assembled core taken approximately on line 30f Fig. 1. H i 1;

Fig. 4 is a,similarcross-sectional view of one ofthe core sections.

Fig. 5 is a cross sectional view ofthelocking ring taken approximately on-r-v-line 5fof c r -em:

Fig. 2. 1. ring core embodying this invention conthe drawings by the reference numerals 6 7, 8 and 9 and are provided with inwardly sists of-a plurality. of separable sections which when assembled together, as hereinafter described, constitute an *annular'memher, the peripheral and lateral faces of which are shaped to impart a preferred configuration to the corresponding inner face of the tire or tire shoe which is to be manufactured thereon. The sections which are employed to form the annular core are designated'in extending flanges 10; These flanges are all similar and, in the embodiment of the in.-

vention shown in the drawings, are providedon'one 'lateralface withthe laterally projecting ribs or shoulders 11. The opposite face 12 of all the flanges 10 are provided i with longitudinal grooves'which, when the several core sections are assembled rovides lie outer -wall-14 of this annular channel 13 is 'pref an annular groove orchannfel 13.

erably at right angles to the lateral race 12 of the flanges lO and also at right angles tothe'bottom faceofthe groove. The inner wall 15 of the channel "13 is-disposed at'an obtuse angle to the bottom face o'f'the channel 13 so as to provide'a seat for the face I 19' of the annular rib'17 on the ring 16 as hereinafterdescribed;

The numeral 16 is used fgenerally tof designate alocking ring-having abase portion 18 which is parallelly disposed to the, axis of the ringand isadapted to support the core sections 6, 7, 8 and 9 and to holdthe said sections from inward movement; Extending outwardly'from one lateral edge of the base portion 18 andata right an le theretois-a circurn'ferentially extending flange 21 which is provided'with a laterally: extendin circumferential rib17- havingan incline face 19 which is adapted tofseat against the face 15 of the channel 13. When the c'oreis assembled ,-the lateral side 21 of therin 16 isin' contact with-the core section, only-a ong the face 19 0f the rib 17 The locking ring 16 is receivmg apertures 23. at oints coinciding with the abutting faces 0 the several:core sections, each'core section i being provided on the ends-of its flanges '10 with a laterally extending semi-circular groove which forms when the core is assembled a laterally extending bolt receiving aperture whichcoincides' with the apertures 23 in the ring 16. In use the core sections,'6',-7, 8 and 9 are assembled. with the inwardly extending rovided with lateral extending bolt i flange 10 f each'section in contactwiththe 

